Are the instrument ports of pressure vessels designed in compliance with the standards?
Thread Content
A pressure vessel was manufactured recently; the pressure gauge connection uses an M20×1.5 thread, while the thermometer connection uses an M27×2 thread. Under normal circumstances, sealing it in place with PTFE gaskets is sufficient. However, the manufacturer did not design a sealing surface for the gaskets, and since the equipment manufacturer does not want to modify the pipe connections, they proposed the following solution: as shown in the diagram, experts, do you think this will work?
It can’t be used. Whether it is M20×1.5 or M27×2, sealing is achieved by using axial force to compress the sealing material; the retract groove does not have the capability to provide a surface subject to axial force ； Both M20×1.5 and M27×2 are non-sealing threads; relying on methods such as tape to prevent leakage is not a proper approach, as it will ultimately cause many problems. .
General flange interfaces for pressure vessels.
No. The gasket cannot be placed in the tool retraction groove, and the upper and lower sealing surfaces of the gasket cannot be pressed together to achieve a seal.
No. The reason is mentioned above; it is possible to consider manufacturing an external thread adapter, using the end of the existing connector to form a sealing surface with the adapter, along with 45/27 gaskets. This is suitable for situations with not too high pressure